Socket receptacle for radiotubes



July 22, 1930. W C, Ma'CFADD'EN A1,771,094

fsocxm" RECEPTACLE FOR RADIoTUBEs Filed Feb. 21, 1929 fil `| NZH lm w oA further Patented July 22,"1930 l d f 1,171,094 p UNITED s'rA'rlisPATENT OFFICE wILronD c. MAGFAIJDEN, or PHILADELPHIA, PENNSYLVANIA,AssIGNon'ro HUGH II.

EBY, OF PHILADELP ASOCKET BECEPTVACLE FOR RADIOTUBES I Application-filedFebruary 21, 1929. -Serial No. 341,696.v

My invention relates to a socket receptacle for the pin terminals of aradio tube and to its support upon a radio panel. l

qOne purpose of my passages of va socket tube around the outsidecircumference/of a raised circular identification disc using the disc toguide the pin terminals into their passages.

purpose is to make -a disc guide on a socketv of a radio tubenonintegral with the body of the receptacle. r

A further purpose is to provide a vacuum 'tube receptacle withinterchangeable guide members of the different colors that are used inthe art to designate the different kinds of tubes so that the samereceptacle may in use be given the correct color marking for any one ofa number of diiferent kinds of tubes with which it is adapted to be usedand may have its color marking readily changed to accommodate its use todifferent kinds of tubes..

A further purpose is to provide a spring supported, shock proof mountedreceptacle with improved double side contact members integral with thespring supports.

A further purpose is to provide av spring supported tube receptacle witha common stop limiting the inward movements of the receptacle duringtube insertions and the outward movements of the receptacle during theWithdrawals.

' Further vpurposes will appear inthe specification and inthe claims.

I have elected to show a few only of the' many forms of my invention,selecting forms that are practical and eiificient in operation and whichwell illustrate the principles inyoived. I 1' i re 1 is a ragmentary topanv View showgiii' a radio socket embodying a desirable form of myinvention mounted in an opening in the top of a radio receiving setchassis.

Figure 2 is a section taken upon the linev 2-2 of Figurel.

1 Figure 3 is a section taken upon the line 3- 3 of Figure 1.

` Figure 4 is a View generally corresponding to Figure 2 but showing adifferent" form of invention is to range the receptacle for4 a radio vreceptacle for the pin terminals socket with means permitting readyinterchange of discs. i

Figure 5 is a bottom plan view of the structure shown in Figure 4. iFigure 6 is a top plan view of another form. Figure 7 is a. verticalsection taken upon the line 7-7 of Figure 6.

Figures 8, 9 and 10 are bottom of diiferent details offFigure 7.

Like numerals refer to like parts in all figures.

plan' views Describing in illustration and not in limi- 4tation andreferring tothe drawings In the form shown in Figures 1 to 3 metal stripU connectors are mounted on the bottom of an insulation plate 15registering with perforations 16 for the pin terminals of a radio tube,`not shown. Y

4Each connector is an integral spring metal member and comprises U legs17 and opposing contact members 18, one on each leg of the U,the'contact members being in position to engage an inserted pin terminalalong its opposite sides. I

VThe legs of the U are bent at right angles away from one anotherattheir outer ends at l 19 and v20 respectively and a bottom plate 21perforated to pass the bodies of the U is fastened to place against thebottom of the plate l/15 with the right angle bend portions of the Ubetween the upper and lower plates, the two plates holding theconnectors to place.

- The top and bottom plates are held together by a fastening member 22which preferably also holds to place a circular disc 23 upon `the ltopof the upper plate.

The disc circumference is preferably substantially tangent with theinner sides of the perforations 16 so that this circumference may beused when placing the tube to guide the prongs of the tube into registrywith their passages 16.

The outwardly extending right bend 19 of the U connector-members areextended downwardly through perforations 24 in the bottom plate and thenbent into a spring 25 that is fastened at 26 to sulation material.

The base plate 27 fastens at 28 to the under a ring base plate 27 of in-Gli side of a plate 29, which may be t-he top of a radio cabinet.Theplate 27 has an interior opening 30 at least large enough to pass thevacuum tubeto the top plate 15.

The springs 25 are extended at 31 for connection into the radio circuit.

Desirably a point portion 32 at the inner ends of the right angle bends20 are bent up into suitable holes 33 in the upper plate, in order tomore definitely register the connectors in their proper positions.

The receptacle portion carrying the connectors is thus resilientlymounted upon the base plate by means of the spring portions 25 of theconnectors.

I find it desirable to limity the inward movement of the receptaclerwhen the vacuum tube is being pushed to place and also to limit itsoutward movement when the vacuum tube is being withdrawn and asillustrated in Fig ures 1 and 3 do this by means ofpradially ex-`tending ears 34 on the lower plate and cooperating brackets 35 on thering base plate 27.

Each fastening member has vertically spaced portions 36 and 37respectively above and below the cooperating ear which has thus afreedom of vertical movement between the said bracket portions.

When the tube is being pushed to place the inward movement of thereceptacle is stopped -when the ears engage their respective brackets at37 and when the tube is being pulled out of the receptacle the outwardmovement of the receptacle is stopped when the ears engage the bracketportions 36.

In the form of Figures 1 to 3 the right angle bends 19 and 20 at theends ot the U are in opposite directions and the connector members areheld to place by means of a bottom cover plate 21 perforated at 38 topass the U bodies and at 24 to pass the spring portions of theconnectors with the inward bends'provided with upwardly extending pointportions 32 into suitable small registry holes 3252 in the upper plate(as in Figure 10).

In the form shown in Figures 4 and 5 I have bent the tail ends of the Uconnector members in the same direction, radially outwardly at rightangles to the legs of the U so that right angle bends of each connectoroverlap one an othervadjacent the outer leg 40 of the U and have heldthem to place upon a plate 41 by a single tubular rivet 42.

The right angle bend 43 that extends across the socketperforation 38 issuitably perforated to permit entry of the pin terminal of the radiotube.

One of the right angle bends is extended and bent downwardly beyond therivet 42 forming a spring 43 which is bent upwardly and connected at 44to an insulation base 45, desirably an integral ring 27 suitablyfastened at 46 to the plate 29 of the radio cabinet. The endsot1 springs43 are extended at 31 to provide connection into the radio circuit.

As inFigures 1 to 3 I provide the to of the plate with a raised boss 23forv gui ing the prongs of the tube into their sockets 16.

The guiding disc 23 is tangent to the inner sides of the socketperfor-ations 16 and is preterably not integral with the plate 41 inthat I iind it desirable to give the guiding disc a color correspondingto the kind of vacuum tube with which it is to be used.

It frequently happens that the same kind of receptacle will at dierenttimes be used with diiierent kinds of tubes that in usual practice arerepresented by different colors and I pre- .ter to' have a plurality ofguide members 23 differently colored to represent the different kinds oftubes with which the receptacle may be used, the guide exactly alike andinterchangeably mounted on the receptacle, and when the receptacle isused at different times with dierent kinds of tubes I change the guidemember soas to accommodate its presented color to the tube that is Atobe used in the receptacle.

In the form of Figures to 10 the connector members are mounted inamouldedinsulation body47, the bodies of the connector members beinginside cavities 48 that extend upwardly from the bottom of the mouldedbody, which is perforated at 162 from the top into the cavities so thatpin terminals entering the sockets 162 enter between the contact membersof the j respective connectors. f

The connector members are shown generally similar to those'of Figures 2and 4 but the U v bend portions 49 -are directed toward the vacuum tub`einstead of away from the vacuum tube. i

The outer ends of the U legs are bent at right angles awayfrom oneanother as in the construction of Figure 2, a bottom cover plate 211holding the right angle bends up against the bottom of the body.

The bottom cover plate is fastened to the body by a central tubularrivet 50 having an upper portion moulded into the bottom of the body anda lower portion riveted over the Abottom plate after assembly.

The outer right angle bends are bent downward through the perforations24 in the bottom plate and are extended as supporting Asprings 25. Thesprings 25 are fastened at 262 to the bottom of a plate 29`that may bethe metal top plate ot a radio chassis.

The body is moulded with radial cavities 51 which receive the extendingears 52 of stop members 53 fastened at' 54 to the bottom of the ring.The extending ears 51 of the stop members limit the inward movement ofthe receptacle during tube insertion by engaging the bottoms of thecavities 51 and limit the outward movementotthe receptacle duringwithdrawal from the receptacle by engagement with the top of the bottomplate.

The body of the receptacle is shown with members being otherwisecavities which serve to lessen the quantity of moulded material.

ln the form ofFigures 6 to l0 the guide 2 32 is moulded integral lovvedat 54 upon its upper side to provide a space for retaining coloringmatter to indi cate the kind of tube that is to be used in thereceptacle.

In viefvv of my invention and disclosure variations and modiiications tomeet individual 'whimi or` particular need will doubtless become evidentto others skilled in the art, to obtain all or part of the benefits ofmy invention Without copying the structure shown, and l, therefore,claim all suoli in so far as they fall Within the reasonable spirit andscope of my invention. n

Having thus described my invention, what l claim as new and desire tosecure by Letters Patent is Y l. A socket receptacle for the prongs of avacuum tube having passages registering with the prong terminals of thetube in combination with a selected identication disc having markingscorresponding to said tube, means for securing said disc on the outerface of the receptacle adjacent the passages and adapted to guide theprongs when placing the tube in its receptacle.

2. A socket receptacle having passages forl the prongs of a vacuum tubein combination with a disc having markings identified with., said tubeon the outer facev of the receptacle', 1

said socket adjaa rivet fastening said disc to cent the inner sides ofsaid passages.

3. A receptacle for a plug-in device having a plurality of passages toreceive the pin terminals of said device in combination with a selectedperforated disc having marking identified With said ing with saidperforation for mounting said disc upon the outside of the receptacletangentiy v with the passages thereof.

4. *A receptacle for a vacuum tube having a plurality of passages toreceive the pin terminals of the tube in combination With a selected`one of a plurality of differently colored discs adapted to be mountedinterchangeably upon the receptacle tangent to the inner sides ofthepassages.

WILFORD C; MACFADDEN.

With the body and is holi device, means cooperat-A

